Decorators are functions that modify other functions from "summary" of Fluent Python by Luciano Ramalho
Decorators are a powerful but often mystifying tool in Python programming. At heart, a decorator is just a callable that takes another function as argument (the decorated function) and returns a new function. In other words, a decorator rebinds the decorated function's name to the result of the decorator's execution. The simplest decorator that can be defined in Python is just a function that returns a function. Decorators are used in Python to modify or extend the behavior of callable objects (functions, methods, or classes) without permanently modifying the callable itself. When a decorator is applied to a function, the original function is replaced by the new function returned by the decorator. This means that the decorated function will now exhibit different behavior when called. Decorators are very versatile and can be used for a wide ra...
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